package eleven;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Random;

public class SortInteger {
    public static void main(String[] args) {
        Random rand = new Random();
        List<Integer> list = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            list.add(rand.nextInt(100));  //rand.nextInt(n),返回一个大于0小于n的数
        }
        System.out.println("list原始数据:" + list); //无序
        Collections.sort(list); //自然排序(从小到大)
        System.out.println("list排序后数据:" + list); //有序(小到大)
        Collections.reverse(list);
        System.out.println("list排序后再反转的数据:" + list);
        System.out.println("第一个元素是:"+list.get(0));
    }
}